[1]张佩佩,张文太,贾宏涛,等.新疆北部地区与其他地区变性土壤线性膨胀系数的差异及矿物学机制[J].南京农业大学学报,2017,40(6):1074-1080.[doi:10.7685/jnau.201702018]
 ZHANG Peipei,ZHANG Wentai,JIA Hongtao,et al.Differences of coefficient of linear extensibility of vertic soils in northern Xinjiang and other regions of China and the mineralogical mechanism[J].Journal of Nanjing Agricultural University,2017,40(6):1074-1080.[doi:10.7685/jnau.201702018]
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新疆北部地区与其他地区变性土壤线性膨胀系数的差异及矿物学机制()
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《南京农业大学学报》[ISSN:1000-2030/CN:32-1148/S]

卷:
40卷
期数:
2017年6期
页码:
1074-1080
栏目:
出版日期:
2017-11-10

文章信息/Info

Title:
Differences of coefficient of linear extensibility of vertic soils in northern Xinjiang and other regions of China and the mineralogical mechanism
作者:
张佩佩1 张文太1 贾宏涛1 姜小三12 武红旗1 朱磊1
1. 新疆农业大学草业与环境科学学院/新疆土壤与植物生态过程自治区重点实验室, 新疆 乌鲁木齐 830052;
2. 南京农业大学资源与环境科学学院, 江苏 南京 210095
Author(s):
ZHANG Peipei1 ZHANG Wentai1 JIA Hongtao1 JIANG Xiaosan12 WU Hongqi1 ZHU Lei1
1. College of Grassland and Environmental Sciences/Xinjiang Key Laboratory of Soil and Plant Ecological Processes, Xinjiang Agricultural University, Urumqi 830052, China;
2. College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
关键词:
混层比黏土矿物组成伊利石-蒙皂石混层黏粒线性膨胀系数新疆北部地区
Keywords:
vertic soilsclay mineralogyillite-smectite mixingclaycoefficient of linear extensibilitynorthern Xinjiang
分类号:
S155.1
DOI:
10.7685/jnau.201702018
摘要:
[目的] 比较不同亚纲变性土之间线性膨胀系数的差异,并通过对比不同亚纲土壤物理属性,解释产生差异的内在机制。[方法] 新疆北部地区(简称北疆地区)是夏旱变性土(含变性土壤)主要分布区,本研究调查了具有变性特征的14个土壤剖面,并搜集了我国其他12个省市140个变性土剖面相关数据,分析了不同亚纲变性土的线性膨胀系数(coefficient of linear extensibility,COLE)、黏粒和蒙皂石含量及其相关关系。[结果] 北疆地区夏旱变性土(含变性土壤)的COLE、黏粒和蒙皂石含量在5个亚纲中最低,其土壤膨胀收缩特性主要受伊利石-蒙皂石混合型矿物组成和混层比的影响,而其他4个亚纲较夏旱变性土(含变性土壤)具有更明显的变性特征。潮湿变性土、湿润变性土和夏旱变性土(含变性土壤)0~100 cm土层的黏粒和蒙皂石含量大于0~30 cm土层,而干润变性土0~30 cm土层含量高于0~100 cm土层。寒变性土随着剖面深度的增加,黏粒和蒙皂石含量无明显变化。潮湿变性土0~100 cm土层蒙皂石含量显著高于干润变性土和夏旱变性土(含变性土壤),且0~100 cm土层的COLE值也显著高于夏旱变性土(含变性土壤),5个亚纲表层土壤的COLE差异不显著。随着黏粒含量的增加,干润变性土蒙皂石含量和潮湿变性土COLE随之增大,表层蒙皂石含量对COLE影响更大。[结论] 北疆地区蒙皂石和伊利石-蒙皂石混合型矿物组成是土壤变性的内在影响因素,变性土中蒙皂石与黏粒呈线性相关,黏土矿物组成对表层土壤膨胀收缩有决定性作用。
Abstract:
[Objectives] To explore the dominant factors affecting vertic characteristics of vertic soils, clay content and mineral composition were compared among suborders of vertisols.[Methods] Northern Xinjiang is the main distribution area of Xererts (including vertic soils), and we analyzed 14 soil pedons of vertic soils from northern Xinjiang, and collected data of 140 vertic soil profiles from 12 provinces of China. Data of coefficient of linear extensibility (COLE), clay content and smectite were analyzed.[Results] COLE, contents of clay and smectite of Xererts (including vertic soils)were the lowest in the five suborders and the swelling and shrinking characteristics of soils in northern Xinjiang were mainly affected by the higher illite-smectite mixing layer content. The other four suborders had more obvious vertic properties than Xererts (including vertic soils). Contents of clay and smectite of Aquerts, Underts and Xererts (including vertic soils)at 0-100 cm were higher than those at 0-30 cm, while the case for Usterts was just in contrary. With increasing depth, clay and smectite did not change significantly for Cryerts. Smectite content of Aquerts was significantly higher than those of Usterts and Xererts (including vertic soils), and COLE value at 0-100 cm soil layer was significantly higher than that of Xererts (including vertic soils). However, COLE values of the five suborders were not significantly different at surface. With increasing of COLE of Aquerts, clay content and smectite content of Usterts increased and the change of surface smectite was linearly related with COLE.[Conclusions] Illite-smectite mixing layer content and smectite content of Xererts (including vertic soils)in northern Xinjiang were the intrinsic factors of soil vertic characteristics, while smectite content was closely related to clay content. Clay mineral composition plays a decisive role in controlling swelling and shrinking of surface’s vertisols.

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备注/Memo

备注/Memo:
收稿日期:2017-02-17。
基金项目:国家自然科学基金项目(41301231);国家科技基础性工作专项(2014FY110200A03);自治区科技支疆项目(2016E02083)
作者简介:张佩佩,硕士研究生。
通信作者:张文太,副教授,硕导,研究方向为水土保持与土壤分类,E-mail:zwt@xjau.edu.cn。
更新日期/Last Update: 1900-01-01